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    <meta charset="UTF-8" />
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    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
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  <body>
    <script>
      var num1 = prompt("请输入一个数字");
      var num2 = prompt("请输入一个数字");
      var num3 = prompt("请输入一个数字");
      //   var arr = [num1, num2, num3];
      function getMax() {
        var max = arguments[0];
        for (var i = 1; i < arguments.length; i++) {
          if (max < arguments[i]) {
            max = arguments[i];
          }
        }
        return max;
      }
      console.log(getMax(num1, num2, num3));
    </script>
  </body>
</html>
